�y��vlog

Canada's bid also enlisted ships to conduct high-resolution gravimetry—measurements of gravity anomalies that reveal seafloor structure.

For example, researchers probably cannot dredge gravimetry measurements out of the engineering data gathered over the years by NASA’s Spirit and Opportunity Mars rovers.

Curiosity doesn’t carry any dedicated gravimetry instruments, so how did Lewis and his team make their measurements?

Using these “gravimetry” measurements, the researchers calculated the density of the rocks beneath Curiosity’s wheels—about 1,680 kilograms per cubic meter.